过滤因子表示谓词的选择性有多强。
每个断言的筛选因子表示优化器估计符合断言的数据的比例。
The Filter factor for each predicate indicates the proportion of data the optimizer estimates will satisfy the predicate.
风险因子表示已认知的威胁对特定资产可能造成的损失百分比。
The exposure factor represents the percentage of loss that a realized threat could have on a certain asset.
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